Precise conductive slip ring for wind power generation

Abstract

The application discloses a precision conductive slip ring for wind power generation and belongs to the technical field of wind power slip rings. The precision conductive slip ring comprises an outer shell body, an inner rotating rod is rotationally connected to the inside of the outer shell body, a plurality of conductive rings are installed on the outside of the inner rotating rod, a plurality of outer connecting rods are installed in the inside of the outer shell body, and a plurality of sleeve shell bodies are installed on the outside of the outer connecting rods. The position of the carbon brush is adjusted by pulling the carbon brush backward by using a center air bag. In addition, gas can be injected into the inside of the center air bag in a use state, so that the center air bag is expanded. The expanded center air bag pushes the carbon brush, so that the carbon brush is attached to the conductive ring. In addition, the amount of gas delivered into the inside of the center air bag can be controlled, so that the attachment degree of the carbon brush to the conductive ring is adjusted. The dynamic adjustment of the attachment degree of the carbon brush to the conductive ring is realized.

Description

Technical Field

[0001] This invention relates to the field of wind power slip ring technology, and more specifically, to a precision conductive slip ring for wind power generation. Background Technology

[0002] Conductive slip rings achieve electrical connection between rotating parts (such as nacelles and blades) and stationary parts (such as towers and control systems) in wind turbine generators through the sliding contact between the conductive ring and the brush. In wind turbine generators, the nacelle, including the generator and converter, needs to rotate 360° with the wind direction to optimize wind capture efficiency, while the tower and grid connection parts remain fixed. Conductive slip rings establish electrical connection between rotating and stationary parts through dynamic contact technology, undertaking three core functions: power transmission, signal interaction, and system protection. However, in the use of existing conductive slip rings, the contact between the carbon brush and the conductive ring becomes uneven due to the gradual wear of the carbon brush and the accumulation of carbon powder. Once this phenomenon occurs, the resistance between the carbon brush and the conductive ring increases, leading to accelerated wear of the carbon brush.

[0003] In the existing conductive slip ring system, the wear rate of the carbon brush varies with the rotational speed of the wind turbine, resulting in varying contact pressure between the carbon brush and the conductive ring. Maintaining continuous contact and ensuring smooth contact is crucial. However, with the gradual wear of the carbon brush and the long-term use of the conductive ring, carbon powder or other impurities accumulate on its exterior, leading to excessive pressure between the brush and the ring. Existing carbon brushes cannot adjust this pressure in a timely manner and can only passively push the brush to continuously contact the conductive ring. Therefore, a precision conductive slip ring for wind power generation is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a precision conductive slip ring for wind power generation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a precision conductive slip ring for wind power generation, comprising an outer shell, an inner rotating rod rotatably connected inside the outer shell, a plurality of conductive rings installed outside the inner rotating rod, a plurality of outer connecting rods installed inside the outer shell, and a plurality of sleeve housings installed outside the outer connecting rods;

[0006] A gas distribution box is fixedly connected inside the sleeve housing. A central air bladder is fixedly connected to the side of the gas distribution box away from the sleeve housing. The side of the central air bladder away from the gas distribution box is fixedly connected to the outside of the carbon brush. The gas distribution box is connected to the central air bladder through the main flow pipe.

[0007] The outer connecting rod is hollow and has multiple inner pipes connected to its exterior. The end of the inner pipe away from the outer connecting rod passes through the outer wall of the sleeve housing and is connected to the gas distribution box. The bottom of the outer connecting rod is connected to a gas supply structure.

[0008] Preferably, a plurality of external pushing bladders are fixedly connected to the side of the gas distribution box away from the sleeve housing. The side of the external pushing bladders away from the gas distribution box is fixedly connected to the outside of the carbon brush. A plurality of internal split pipes are connected to the outside of the gas distribution box. The plurality of internal split pipes are respectively connected to the plurality of external pushing bladders. A ventilation structure is installed inside the internal split pipes. The plurality of external pushing bladders surround the outer periphery of the central airbag.

[0009] Preferably, the outer surface of the external push bladder is integrally formed with an external expansion membrane, the expansion coefficient of the external expansion membrane is smaller than that of the external push bladder, the external expansion membrane is provided with an external vent hole, and the carbon brush is provided with a plurality of air outlet grooves, the plurality of air outlet grooves being aligned with the direction of the plurality of external expansion membranes.

[0010] Preferably, a baffle plate is integrally formed at the connection position between the external pushing bladder and the external expansion membrane. The baffle plate is used to block multiple leakage holes in the normal condensation state of the external expansion membrane. Multiple suction cups are integrally formed on the outside of the baffle plate. The suction cups are used to adsorb the leakage holes in the normal condensation state of the external expansion membrane.

[0011] Preferably, a spring is fixedly connected to the side of the gas distribution box away from the sleeve housing, and a carbon brush is connected to the other end of the spring.

[0012] Preferably, the air supply structure includes multiple lower connectors, which are installed at the bottom of the outer connecting rod. The air inlet and outlet of each lower connector, away from the outer connecting rod, are connected to an air supply pipe. The end of the air supply pipe away from the lower connector is connected to a bidirectional air pump via a multi-way electrically controlled valve.

[0013] Preferably, the gas distribution box is connected to an internal pushing airbag via a delivery pipe. A scraper is fixedly connected to the side of the internal pushing airbag away from the gas distribution box. A side slot is provided on one side of the sleeve housing. The scraper is movably connected to the inner wall of the side slot via an elastic rotating shaft.

[0014] Preferably, the ventilation structure includes multiple elastic valve plates, which are respectively hinged inside multiple inner diversion pipes, delivery pipes, and main flow pipes. Each inner diversion pipe, delivery pipe, and main flow pipe is connected to a piezoelectric valve plate. The side of the piezoelectric valve plate away from the inner wall of the inner diversion pipe, delivery pipe, and main flow pipe is fixedly connected to the outer wall of the inner diversion pipe. An obstruction block is fixedly connected to the inner wall of the inner diversion pipe, delivery pipe, and main flow pipe.

[0015] Preferably, the outer casing of the sleeve housing is bolted to an outer snap-fit ​​shell, and both the outer casing and the outer snap-fit ​​shell are integrally formed with an arc-shaped portion. The outer casing and the outer snap-fit ​​shell are sleeved onto the outer side of the outer connecting rod through the arc-shaped portion.

[0016] Preferably, strain gauges are fixedly connected to the exterior of the central airbag and the multiple external pushing airbags, and a data acquisition card is installed inside the sleeve housing and the carbon brush;

[0017] The formula for collaborative calculation is: .

[0018] Spring stiffness coefficient;

[0019] Spring compression;

[0020] : Intra-airbag pressure;

[0021] Effective area of ​​the airbag;

[0022] Pressure transmission efficiency;

[0023] The thrust generated by the airbag;

[0024] The principle formula for strain gauge deformation monitoring is as follows: ;

[0025] : Change in resistance of the strain gauge;

[0026] Initial resistance;

[0027] : Strain coefficient;

[0028] : Deformation variable (dimensionless);

[0029] The formula for calculating the conversion from deformation to pressure is: ;

[0030] : Elastic modulus of airbag material (MPa);

[0031] : Effective coverage area of ​​the strain gauge (mm²);

[0032] The thrust generated by the airbag;

[0033] A contact resistance diagnostic model was established, and the resistance between the carbon brush and the conductive ring was measured in real time using a data acquisition card. The pressure correlation formula is as follows: .

[0034] Carbon brush resistivity (μΩ·m);

[0035] : Hardness of carbon brush material (HB).

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] In this invention, the central airbag can pull the carbon brush under normal conditions. When the carbon brush wears out and needs adjustment, the central airbag pulls the carbon brush backward to adjust its position. In use, gas can be injected into the central airbag to cause it to expand. The expanded central airbag pushes the carbon brush, causing it to adhere to the conductive ring. Furthermore, the degree of adhesion between the carbon brush and the conductive ring can be adjusted by controlling the amount of gas supplied to the central airbag. Overall, the degree of adhesion between the carbon brush and the conductive ring can be dynamically adjusted. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the outer connecting rod and the sleeve housing in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the lower connector in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the separated state structure of the outer card housing and the sleeve housing in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the exploded structure in an embodiment of the present invention;

[0043] Figure 6 This is a schematic cross-sectional view of the external expansion membrane in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the structure of the elastic valve plate and the piezoelectric valve plate in an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the verification process for the central airbag in Embodiment 1 of the present invention;

[0046] Figure 9 This is a schematic diagram of the industrial control process in Embodiment 1 of the present invention;

[0047] Figure 10 This is a schematic diagram of the compensation process in Embodiment 2 of the present invention.

[0048] In the diagram: 100, outer shell; 101, inner rotating rod; 102, outer connecting rod; 103, sleeve shell; 104, carbon brush; 105, lower connector; 106, gas delivery pipe; 107, outer snap-fit ​​shell; 108, inner connecting pipe; 109, gas diversion box; 110, central airbag; 111, spring; 112, conductive ring; 113, strain gauge; 200, outer pushing bladder; 201, inner diversion pipe; 202, elastic valve plate; 203, piezoelectric valve plate; 204, blocking block; 300, outer expansion membrane; 301, external vent hole; 302, baffle plate; 303, gas outlet groove; 400, suction cup; 500, scraper; 501, side slot; 502, inner pushing airbag; 600, main flow pipe. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1, such as Figure 1 As shown, this application discloses a precision conductive slip ring for wind power generation, including an outer shell 100, an inner rotating rod 101 rotatably connected inside the outer shell 100, a plurality of conductive rings 112 installed outside the inner rotating rod 101, a plurality of outer connecting rods 102 installed inside the outer shell 100, and a plurality of sleeve housings 103 installed outside the outer connecting rods 102.

[0051] A gas split box 109 is fixedly connected inside the sleeve housing 103. A central air bladder 110 is fixedly connected to the side of the gas split box 109 away from the sleeve housing 103. The side of the central air bladder 110 away from the gas split box 109 is fixedly connected to the outside of the carbon brush 104. The gas split box 109 is connected to the central air bladder 110 through the main flow pipe 600.

[0052] The outer connecting rod 102 is hollow and has multiple inner pipes 108 connected to the outside. The end of the inner pipe 108 away from the outer connecting rod 102 passes through the outer wall of the sleeve housing 103 and is connected to the gas distribution box 109. The bottom of the outer connecting rod 102 is connected to a gas supply structure.

[0053] Specifically, during use, the inner rotating rod 101 connects to components such as the wind turbine shaft. After connection, gas can be injected into the hollow outer connecting rod 102 through the gas supply structure. When gas is injected into the hollow outer connecting rod 102, the outer connecting rod 102 can divert the gas into multiple gas diversion boxes 109. When the gas is diverted into multiple gas diversion boxes 109, gas can be injected into the central air bladder 110 through the main flow pipe 600. When gas is continuously injected into the central air bladder 110, the central air bladder 110 can expand. The expanded central air bladder 110 can push the carbon brush 104 to adhere to the conductive ring 112.

[0054] like Figure 5 As shown, a spring 111 is fixedly connected to the side of the gas distribution box 109 away from the sleeve housing 103, and a carbon brush 104 is connected to the other end of the spring 111.

[0055] Specifically, similar to traditional pushing technology, the thrust generated by the spring 111 can push the carbon brush 104 to adhere to the conductive ring 112. During use, the central airbag 110 normally pulls the carbon brush 104 backward. That is, when the gas inside the central airbag 110 is discharged, the central airbag 110 contracts. In this state of contraction, the carbon brush 104 is dragged backward. This allows the carbon brush 104 to discharge the gas inside the central airbag 110 when it gradually wears down and the resistance detection becomes abnormal. This causes the central airbag 110 to contract, which in turn causes the carbon brush 104 to gradually retract, reducing the excessive compression between the carbon brush 104 and the conductive ring 112. Overall, the dynamic adjustment of the compression force between the carbon brush 104 and the conductive ring 112 is achieved.

[0056] like Figure 5 As shown, strain gauges 113 are fixedly connected to the outside of the central airbag 110 and multiple external pushing airbags 200, and data acquisition cards are installed inside the sleeve housing 103 and carbon brush 104.

[0057] Specifically, when the carbon brush 104 gradually wears down and the resistance between the carbon brush 104 and the conductive ring 112 is found to be abnormal through the data acquisition card, gas is injected into and vented from the central air bladder 110 to reduce or increase the squeezing force of the carbon brush 104 on the conductive ring 112, thereby adjusting the fit between the carbon brush 104 and the conductive ring 112.

[0058] like Figures 8-10As shown, when obtaining the resistance value between the carbon brush 104 and the conductive ring 112, the strain gauge 113 outside the central air bladder 110 is used to measure the deformation value. When gas is injected into or vented from the central air bladder 110, the strain gauge 113 will undergo tensile and condensation deformation along with the central air bladder 110, thereby generating different strain resistance values. The generated strain resistance value and the resistance value between the carbon brush 104 and the conductive ring 112 are used to calculate whether gas should be injected into or vented from the central air bladder 110.

[0059] The formula for collaborative calculation is: .

[0060] Spring stiffness coefficient; Spring compression; : Intra-airbag pressure; Effective area of ​​the airbag;

[0061] Pressure transmission efficiency; Total contact pressure.

[0062] The principle formula for deformation monitoring of strain gauge 113 is as follows: ;

[0063] : Change in resistance of the strain gauge; Initial resistance; : Strain coefficient; : Deformation variable (dimensionless).

[0064] The formula for calculating the conversion from deformation to pressure is: .

[0065] : Elastic modulus of airbag material (MPa);

[0066] : Effective coverage area of ​​the strain gauge (mm²);

[0067] The thrust generated by the airbag;

[0068] A contact resistance diagnostic model was established, and the resistance between carbon brush 104 and conductive ring 112 was measured in real time using a data acquisition card. The pressure correlation formula is as follows: .

[0069] Carbon brush resistivity (μΩ·m);

[0070] : Hardness of carbon brush material (HB).

[0071] like Figures 1-3 As shown, the air supply structure includes multiple lower connectors 105, which are installed at the bottom of the outer connecting rod 102. The air inlet and outlet of the lower connector 105 away from the outer connecting rod 102 are connected to an air supply pipe 106. The end of the air supply pipe 106 away from the lower connector 105 is connected to a bidirectional air pump through a multi-way electric control valve.

[0072] Specifically, during use, when it is necessary to deliver gas into the central airbag 110, the bidirectional air pump can be started and the multi-way solenoid valve can be opened. The bidirectional air pump continuously delivers gas into the multi-way solenoid valve. The multi-way solenoid valve can control the connection and closure between the multi-way air supply pipes 106, thereby delivering gas into the multi-way air supply pipes 106 respectively. When the gas is delivered into the air supply pipes 106, the air supply pipes 106 will deliver the gas into the lower connector 105 respectively, and through the lower connector 105, the gas will be delivered into the outer connecting rod 102 respectively. When the gas is delivered into the outer connecting rod 102, through the multiple inner pipes 108, the gas can be delivered into the gas distribution box 109 respectively. When the gas enters the gas distribution box 109, it can be delivered into the central airbag 110 or other components through multiple ventilation structures.

[0073] like Figure 4 As shown, the outer sleeve shell 103 is bolted to the outside of the sleeve shell 103 and the outer sleeve shell 107 are integrally formed with an arc-shaped part. The sleeve shell 103 and the outer sleeve shell 107 are sleeved to the outside of the outer connecting rod 102 through the arc-shaped part.

[0074] Specifically, during use, when installing the sleeve housing 103, the inner pipe 108 is inserted into the inlet and outlet of the gas distribution box 109. After insertion, an initial alignment is achieved. The arc-shaped part of the sleeve housing 103 and the arc-shaped part of the outer clamp housing 107 are then fitted onto the outside of the outer connecting rod 102. After connection, bolts are passed through the outside of the outer clamp housing 107 and threaded into the inside of the sleeve housing 103. The sleeve housing 103 is fixed and installed through the outer clamp housing 107 and bolts.

[0075] The technical solutions in the above-described embodiments of this application have at least the following technical effects or advantages: Compared with the prior art, in this embodiment, the spring 111 can push the carbon brush 104, while the central airbag 110 can pull the carbon brush 104 in the normal state. Thus, when the carbon brush 104 wears and needs adjustment, the central airbag 110 can be used to pull the carbon brush 104 backward to adjust its position. Furthermore, gas can be injected into the central airbag 110 during use, causing the central airbag 110 to expand. The expanded central airbag 110 pushes the carbon brush 104, causing the carbon brush 104 to adhere to the conductive ring 112. Moreover, the degree of adhesion between the carbon brush 104 and the conductive ring 112 can be adjusted by controlling the amount of gas delivered into the central airbag 110. Overall, the degree of adhesion between the carbon brush 104 and the conductive ring 112 is dynamically adjusted.

[0076] Example 2: Considering that during use, the carbon brush 104 needs to adhere to the outer wall of the conductive ring 112, but when the carbon brush 104 itself is uneven, it cannot adhere smoothly to the outside of the conductive ring 112. In this case, because the adhesion of the carbon brush 104 is incomplete, it may cause excessive local contact pressure. Once this occurs, it will accelerate the wear of the carbon brush 104 and generate more carbon dust. To address the above technical problems, the following technical solution is proposed to solve them:

[0077] like Figures 1-5 As shown, a plurality of external pushing bladders 200 are fixedly connected to the side of the gas diversion box 109 away from the sleeve housing 103. The side of the external pushing bladders 200 away from the gas diversion box 109 is fixedly connected to the outside of the carbon brush 104. A plurality of internal diversion pipes 201 are connected to the outside of the gas diversion box 109. The plurality of internal diversion pipes 201 are respectively connected to the plurality of external pushing bladders 200. A ventilation structure is installed inside the internal diversion pipes 201. The plurality of external pushing bladders 200 surround the outer periphery of the central airbag 110.

[0078] Specifically, during use, when the data acquisition card detects an abnormal increase in resistance between the carbon brush 104 and the conductive ring 112, gas can be injected into the interior of multiple external pushing bladders 200. Injecting gas into these bladders causes them to expand, pushing the carbon brush 104 in multiple directions. This multi-directional pushing increases the pressure between the carbon brush 104 and the conductive ring 112 at different locations. By increasing the pressure between the carbon brush 104 and the conductive ring 112 at different locations, the flatness between them is adjusted.

[0079] Specifically, for example, if the right side of the carbon brush 104 is not fully adhered, the left side will be subjected to greater pressure. Continuous pressure on the left side may lead to excessive wear of the left carbon brush 104. Furthermore, the resistance of the left carbon brush 104 under continuous compression differs from that when the carbon brush 104 is fully adhered to the conductive ring 112. In this case, by filling the outer pushing bladder 200 corresponding to the right side position with gas, the outer pushing bladder 200 expands, thereby pushing the right side of the carbon brush 104 to gradually adhere to the conductive ring 112. When the right side of the carbon brush 104 is pushed to contact the conductive ring 112, the left carbon brush 104 will experience less excessive compression due to the push from the right side, thus further adjusting the adhesion between the carbon brush 104 and the conductive ring 112.

[0080] like Figure 7 As shown, the ventilation structure includes multiple elastic valve plates 202, which are respectively hinged inside multiple inner diversion pipes 201, delivery pipes, and main flow pipes 600. Piezoelectric valve plates 203 are connected inside each of the inner diversion pipes 201, delivery pipes, and main flow pipes 600. The side of the piezoelectric valve plate 203 away from the inner wall of the inner diversion pipes 201, delivery pipes, and main flow pipes 600 is fixedly connected to the outer wall of the inner diversion pipe 201. Blocking blocks 204 are fixedly connected to the inner walls of the inner diversion pipes 201, delivery pipes, and main flow pipes 600. Figure 7 The middle arrow indicates the direction of airflow.

[0081] Specifically, during use, the inflation and deflation of gas inside the multiple external air bladders 200 and the central air bladder 110 are controlled by a ventilation structure. In the ventilation structure, the shape change and return to the original shape of the piezoelectric valve 203 can be controlled by energizing and de-energizing the piezoelectric valve 203. When the piezoelectric valve 203 is energized, it can cause the elastic valve 202 to tilt. When the elastic valve 202 tilts, it can open the channels in the inner diversion pipe 201, the delivery pipe and the main flow pipe 600. When the piezoelectric valve 203 is de-energized, the elastic valve 202 will return to its original position through its own elasticity, and the blocking block 204 prevents the elastic valve 202 from tilting to the air intake side.

[0082] like Figures 8-10 As shown, during the expansion and propulsion process of multiple external propulsion bladders 200, the entire system performs inflation and deflation tests in four directions in turn when a change in resistance value is detected at the front, to determine whether the resistance value is balanced after inflation at the current direction. The determination formula is as follows:

[0083] .

[0084] To confirm if there is poor contact in this area, for example, after the right-side external push-type bladder is inflated by 200, From 1mΩ to 10mΩ, and when equal to the set value The time lock is set to the right fault position, where The set threshold;

[0085] For testing contact resistance; This is the contact resistance after testing.

[0086] After locating the fault, the basic compensation amount of the external thrust bladder 200 is calculated using the compensation amount calculation model. The calculation formula is as follows: ;

[0087] Abnormal contact resistance;

[0088] To design the rated contact resistance;

[0089] Compensation coefficient (0.6 N / mΩ);

[0090] 10mΩ (design value).

[0091] An adjustment factor is set in the calculation, and an azimuth weight coefficient is introduced. The weighting coefficients for the four directions (up, down, left, and right) are set differently.

[0092] The final compensation force is calculated using the azimuth weighting coefficient. The calculation formula is as follows: ;

[0093] For the ultimate compensating force, It serves as the basic compensating force.

[0094] The technical solutions in the above-described embodiments of this application have at least the following technical effects or advantages: Compared with Embodiment 1, in this embodiment, the change in the resistance value between the carbon brush 104 and the conductive ring 112 determines whether the carbon brush 104 is tilted and excessively compressed. At this time, by filling the multiple external pushing bladders 200 with gas, the external pushing bladders 200 expand, and the expanded external pushing bladders 200 adjust the contact state between the carbon brush 104 and the conductive ring 112, thus avoiding excessive pressure on one side of the carbon brush 104 during use, which would lead to excessive wear.

[0095] Example 3: Considering that although multiple external pushing bladders 200 can expand to tilt and squeeze the carbon brush 104, if the carbon brush 104 fails to make proper contact due to carbon powder buildup on the outside of the conductive ring 112, causing unevenness, the air pump will continuously inject gas into the multiple external pushing bladders 200 after the strain gauge 113 and data acquisition card continuously transmit information about the lack of proper contact, resulting in continuous compression. This causes the external pushing bladders 200 to continuously push the carbon brush 104 and squeeze the conductive ring 112, leading to excessive pressure on the carbon brush 104 and excessive wear. To address the above technical problems, this application proposes the following technical solution:

[0096] like Figures 2-6 As shown, an external expansion membrane 300 is integrally formed on the outside of the external push bladder 200. The expansion coefficient of the external expansion membrane 300 is smaller than that of the external push bladder 200. An external vent hole 301 is opened on the outside of the external expansion membrane 300. Multiple air outlet grooves 303 are opened on the outside of the carbon brush 104. The multiple air outlet grooves 303 are aligned with the multiple external expansion membranes 300.

[0097] Specifically, during use, if gas is continuously pumped into the outer pushing bladder 200, the outer pushing bladder 200 will continuously expand. However, excessive expansion will still cause excessive compression of the carbon brush 104. An external vent 301 is provided on the outside of the integrally formed outer expansion membrane 300 of the outer pushing bladder 200. The external vent 301 can be used to discharge gas when an excessive amount of gas enters the outer pushing bladder 200.

[0098] Furthermore, when an excessive amount of gas enters the externally pushed bladder 200, the external expansion membrane 300 will expand and continue to extend outward during expansion, thereby extending into the air outlet groove 303 opened on the outside of the carbon brush 104. In conjunction with the air outlet groove 303, the gas is sprayed out to the outside of the conductive ring 112. The sprayed gas can cool the carbon brush 104 to a certain extent and also blow away and clean the carbon powder accumulated on the outside of the conductive ring 112.

[0099] like Figures 2-5 As shown, the gas diversion box 109 is connected to an internal pushing airbag 502 via a delivery pipe. A scraper 500 is fixedly connected to the side of the internal pushing airbag 502 away from the gas diversion box 109. A side slot 501 is provided on the side of the sleeve housing 103. The outside of the scraper 500 is movably connected to the inner wall of the side slot 501 via an elastic rotating shaft.

[0100] Specifically, during use, after running for a period of time, gas is pushed into the airbag 502 through the gas diversion box 109 within a fixed time interval. When the airbag 502 is continuously pushed inward to fill with gas, the scraper 500 can be driven to rotate around the elastic shaft. When the scraper 500 rotates, the outer inclined part can be made to adhere to the outside of the conductive ring 112. When the inclined part of the scraper 500 adheres to the outside of the conductive ring 112, it can form a scraping effect on the carbon powder on the outside of the conductive ring 112. Combined with the gas blown out of the vent hole 301, the carbon powder accumulated on the outside of the conductive ring 112 can be further blown away and cleaned.

[0101] Furthermore, during use, when the deformation of an external pushing bladder 200 reaches a certain level as detected by the corresponding strain gauge 113, gas is actively injected into the interior of the inward pushing bladder 502, thereby pushing the scraper 500 to adhere to the outside of the conductive ring 112 to form a scraping effect.

[0102] like Figure 6 As shown, a baffle plate 302 is integrally formed at the connection position between the external push bladder 200 and the external expansion membrane 300. The baffle plate 302 is used to block multiple leakage holes 301 in the normal condensation state of the external expansion membrane 300. Multiple suction cups 400 are integrally formed on the outside of the baffle plate 302. The suction cups 400 are used to adsorb the leakage holes 301 in the normal condensation state of the external expansion membrane 300.

[0103] Specifically, during use, although the external vent 301 only opens during the expansion of the external expansion membrane 300, it remains a through hole and gas leakage will always occur during use. Therefore, when the external expansion membrane 300 is in its normal state, the condensed external expansion membrane 300 compresses the baffle plate 302 to close the communication space between the external push bladder 200 and the external expansion membrane 300. When the external expansion membrane 300 expands, it loses its compression on the baffle plate 302, causing the gas to push the baffle plate 302 open and eject the gas through the external vent 301.

[0104] Furthermore, when the outer expansion film 300 is in a condensed state, the suction cup 400 corresponds to the position of the external leakage hole 301, and can adsorb the outer periphery of the external leakage hole 301. When the adsorption effect is formed, the external leakage hole 301 can be sealed again to reduce the possibility of gas leakage from the external leakage hole 301.

[0105] The technical solutions in the above-described embodiments of this application have at least the following technical effects or advantages: Compared with Embodiment 2, in this embodiment, when the resistance between the carbon brush 104 and the conductive ring 112 is abnormal and gas is continuously injected into the bladder 200, the maximum amount of gas injected into the bladder 200 can be limited by the external expansion membrane 300 and the external vent 301, thus avoiding excessive compression between the carbon brush 104 and the conductive ring 112 on one side due to the continuous injection of gas into the bladder 200. Furthermore, when the external expansion membrane 300 expands, the gas ejected from the external vent 301 can be guided to the surface of the conductive ring 112 through the vent groove 303. This can disperse the carbon powder on the surface of the conductive ring 112 and continuously provide a certain heat dissipation effect for the carbon brush 104.

[0106] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision conductive slip ring for wind power generation, comprising an outer shell (100), wherein an inner rotating rod (101) is rotatably connected inside the outer shell (100), and a plurality of conductive rings (112) are mounted outside the inner rotating rod (101), characterized in that: The outer casing (100) has a plurality of external connecting rods (102) installed inside, and a plurality of sleeve housings (103) are installed outside the external connecting rods (102). A gas split box (109) is fixedly connected inside the sleeve housing (103). A central air bladder (110) is fixedly connected to the side of the gas split box (109) away from the sleeve housing (103). The side of the central air bladder (110) away from the gas split box (109) is fixedly connected to the outside of the carbon brush (104). The gas split box (109) is connected to the central air bladder (110) through the main flow pipe (600). The outer connecting rod (102) is hollow and has multiple inner pipes (108) connected to its exterior. The end of the inner pipe (108) away from the outer connecting rod (102) passes through the outer wall of the sleeve shell (103) and is connected to the gas distribution box (109). The bottom of the outer connecting rod (102) is connected to a gas supply structure.

2. The precision conductive slip ring for wind power generation according to claim 1, characterized in that: A plurality of external pushing bladders (200) are fixedly connected to the side of the gas split box (109) away from the sleeve housing (103). The side of the external pushing bladders (200) away from the gas split box (109) is fixedly connected to the outside of the carbon brush (104). A plurality of internal split tubes (201) are connected to the outside of the gas split box (109). The plurality of internal split tubes (201) are respectively connected to the plurality of external pushing bladders (200). A ventilation structure is installed inside the internal split tubes (201). The plurality of external pushing bladders (200) surround the outer periphery of the central airbag (110).

3. The precision conductive slip ring for wind power generation according to claim 2, characterized in that: The outer push bladder (200) is integrally formed with an outer expansion membrane (300), the expansion coefficient of the outer expansion membrane (300) is smaller than that of the outer push bladder (200), the outer expansion membrane (300) is provided with an external vent hole (301), and the carbon brush (104) is provided with a plurality of air outlet grooves (303), the plurality of air outlet grooves (303) are aligned with the plurality of outer expansion membranes (300).

4. A precision conductive slip ring for wind power generation according to claim 3, characterized in that: A baffle plate (302) is integrally formed at the connection position between the external push bladder (200) and the external expansion membrane (300). The baffle plate (302) is used to block multiple leakage holes (301) in the normal condensation state of the external expansion membrane (300). Multiple suction cups (400) are integrally formed on the outside of the baffle plate (302). The suction cups (400) are used to adsorb the leakage holes (301) in the normal condensation state of the external expansion membrane (300).

5. A precision conductive slip ring for wind power generation according to claim 1, characterized in that: A spring (111) is fixedly connected to the side of the gas split box (109) away from the sleeve housing (103), and a carbon brush (104) is connected to the other end of the spring (111).

6. A precision conductive slip ring for wind power generation according to claim 1, characterized in that: The gas supply structure includes multiple lower connectors (105), which are installed at the bottom of the outer connecting rod (102). The inlet and outlet ports of the lower connectors (105) away from the outer connecting rod (102) are connected to a gas supply pipe (106). The end of the gas supply pipe (106) away from the lower connectors (105) is connected to a bidirectional gas pump through a multi-way electrically controlled valve.

7. A precision conductive slip ring for wind power generation according to claim 2, characterized in that: The gas distribution box (109) is connected to an internal pushing airbag (502) via a delivery pipe. A scraper (500) is fixedly connected to the side of the internal pushing airbag (502) away from the gas distribution box (109). A side slot (501) is provided on one side of the sleeve housing (103). The scraper (500) is movably connected to the inner wall of the side slot (501) via an elastic rotating shaft.

8. A precision conductive slip ring for wind power generation according to claim 7, characterized in that: The ventilation structure includes multiple elastic valve plates (202), which are respectively hinged inside multiple inner diversion pipes (201), delivery pipes and main flow pipes (600). Piezoelectric valve plates (203) are connected inside the inner diversion pipes (201), delivery pipes and main flow pipes (600). The side of the piezoelectric valve plate (203) away from the inner wall of the inner diversion pipes (201), delivery pipes and main flow pipes (600) is fixedly connected to the outer wall of the inner diversion pipes (201). A blocking block (204) is fixedly connected to the inner wall of the inner diversion pipes (201), delivery pipes and main flow pipes (600).

9. A precision conductive slip ring for wind power generation according to claim 1, characterized in that: The outer casing (103) is bolted to the outside of an outer snap-fit ​​shell (107). Both the outer casing (103) and the outer snap-fit ​​shell (107) are integrally formed with an arc-shaped part. The outer casing (103) and the outer snap-fit ​​shell (107) are sleeved to the outside of the outer connecting rod (102) through the arc-shaped part.

10. A precision conductive slip ring for wind power generation according to claim 8, characterized in that: Strain gauges (113) are fixedly connected to the outside of the central airbag (110) and multiple external push-blade bodies (200), and data acquisition cards are installed inside the sleeve housing (103) and carbon brush (104). The formula for collaborative calculation is: ; Spring stiffness coefficient; Spring compression; : Intra-airbag pressure; Effective area of ​​the airbag; Pressure transmission efficiency; Total contact pressure; In the deformation monitoring process of strain gauge (113), the principle formula for measurement is: ; : Change in resistance of the strain gauge; Initial resistance; : Strain coefficient; : Deformation variable; The formula for calculating the conversion from deformation to pressure is: ; : Elastic modulus of airbag material; : Effective coverage area of ​​the strain gauge; The thrust generated by the airbag; A contact resistance diagnostic model was established, and the resistance between the carbon brush (104) and the conductive ring (112) was measured in real time using a data acquisition card. The pressure correlation formula is as follows: ; Carbon brush resistivity; : Hardness of carbon brush material.

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